The Vision DMX Protocol is completely based on DMX 512. The only difference similiar to the Vision RDM Protocol is the transport layer and the first data byte in the data stream . The Vision DMX is received via the SPI Communication.

DMX512 (E1.11 – 2008, USITT DMX512-A) is a standard for digital communication networks that are commonly used to control lighting and effects.

DMX512 Protocol

DMX512 is a digital communication standard that sends control data over a single cable to multiple devices, like dimmers, spotlights, and moving heads, typically used in theatrical, concert, and event lighting. The data is sent in packets with up to 512 separate channels, each controlling a specific aspect of the lighting fixtures.

DMX Personalities

„DMX Personalities“ refer to the different configurations that a DMX-controllable device can have. Each personality represents a different mode of operation, affecting how many channels a device uses and what each channel controls. For example, a lighting fixture might have one personality that uses three channels for red, green, and blue lighting control, and another personality that uses four channels like Master Dimmer, red, green,blue.

DMX Start Address

The start address is the first channel number that a device listens to on the DMX network. It defines where in the sequence of 512 channels a device’s control begins. For instance, if a device is set to a start address of 101, and it operates in a personality using 5 channels, it will use channels 101 to 105. Setting the correct start address is crucial for the proper operation of the lighting system, as it ensures that the correct data is sent to the intended devices.

DMX Footprint

The „footprint“ refers to the number of consecutive DMX channels a device uses based on its current personality. A device with a larger footprint will use more channels, which allows for more granular control over various functions of the device. The footprint size can vary depending on the device’s complexity and the personality selected. For instance, a simple dimmer might have a footprint of 1, while a sophisticated moving head could have a footprint of 20 or more channels.

This means that Vision DMX follows the same principles as standard DMX512 in terms of DMX Personalities, Start Address, and Footprint. However, the key difference lies in the method of data transmission; instead of the typical DMX512 protocol, Vision DMX uses SPI (Serial Peripheral Interface) for receiving data packets. This is a common hardware interface used for short-distance communication, particularly in embedded systems.